XtGetKeysymTable
returns a pointer to the Intrinsics' copy of the server's KeyCode-to-KeySym
table. This table must not be modified.

The XtKeysymToKeycodeList procedure
returns all the KeyCodes that have keysym in their entry for the keyboard
mapping table associated with display. The caller should free the storage
pointed to by keycodes_return using XtFree when it is no longer useful.